Cleaning brush



FIG. 1 is a perspective view of a cleaning brush showing my new design;

FIG. 2 is a front perspective thereof;

FIG. 3 is a rear perspective view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines depicting bristles represent environmental subject matter than forms no part of the claimed design. 

CLAIM The ornamental design for a cleaning brush, as shown and described. 